Finding the Fourth Proportional to 1,978.58, 2,724.20 and 1,742.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.58 : 2,724.20 = 1,742.37 : x
2. Step 2: Convert to fraction form
   1,978.58/2,724.20 = 1,742.37/x
3. Step 3: Cross multiply
   1,978.58x = 2,724.20 × 1,742.37
4. Step 4: Simplify right side
   1,978.58x = 4,746,555.64
5. Step 5: Solve for x
   x = 4,746,555.64/1,978.58
6. Step 6: Final answer
   x = 2,398.97